This research measured the state uneasiness before and behind a game start for the boy college student who makes track and field the speciality, and aimed at clarifying the relation of the state uneasiness and the performance which were measured. The candidate for investigation was the player of the jump of the J university men's track-and-field part of a Kanto university track-and-field confrontation championship 1 part affiliation school. Investigation was conducted using the track-and-field convention and the record meeting in Heisei 10.11. The Japanese version of STAI which Spielberger and others created was used for measurement of state uneasiness, and measurement kickoff before and after a game was carried out.1. In this research, even if the game of a confrontation game, a record meeting, etc. was different, compared with the team sport, the uneasy tendency was playing a game in the high state.2. the game result in individual performance, and a state - although the uneasy relation had the high uneasy tendency, the same tendency as it of the team performance which it is as a result of [ conventional ] research was seen3. Although the uneasy tendency decreased just before the game rather than 2-hour before of a game in the game by which the target was attained, the tendency for an uneasy tendency to become high in the game by which a target was not attained just before a game was seen4. the game by which the target was attained, and the game which is not attained - setting - the state immediately after a game - it set uneasily and the big difference was seen.5. Change state uneasiness according to the importance and the contents of a game of a game for a player. Before it judged them and the game started, it became clear that making mental condition under game and after a game is important.4.目標が達成された試合と達成されなっかた試合においては、試合直後の状態不安において大きな差が見られた。5.選手にとって、試合の重要度や試合内容によって状態不安が変動することから、それらを判断し、試合が始まる前、試合中、試合後の心理的コンディション作りが重要であることがわっかた。